Took my S2k apart a while back to reverse engineer parts out of it for the company I did a bit of that for. It never made it back together, just never had the time or motivation to do so. Went to put it together, and found a worrying amount of rust. Thankfully it was all very much surface rust, and a bit of Tri-Care and some elbow grease cleaned it all right off.
Now to remember how to put this thing back together, I took it ALL the way apart, instead of just partway like you do for normal cleaning.